Firstly, this paper describes basic parameters of the wireless radio channel and proves that AM broadcast channel is weak spread channel. A wireless Raleigh channel model is given in this part.

• 本文首先描述了表征无线广播信道的基本参数，证明了调幅广播信道是弱扩展信道，并给出了无线瑞利信道的仿真模型。